THEORY
Actually, it may be because I broke physics.exe and logic.exe with that wingless “plane”. And this would be the revenge of Mr. Physics, but luckily our good old friend XML modding has come to the rescue and 420’d on Mr. Physics.

Already tagged you in the part post, I don’t want to upload the whole plane because of spoilers and whatnot. However, if that really concerns you, I guess I’ll have to upload the plane then.

@ThatOneF15Eagle I mean when you do finish the plane, tag me. k?

I won’t upload the whole plane, just the part so it’s easier to work with.
@DarDragon

@ThatOneF15Eagle Ok. Also, tag me when you finish the plane. I want to see it

Alright, I’ll be soon uploading the part.
@DarDragon

@ThatOneF15Eagle Alright, But the reason the hinges are bouncing is probably because there is to much stress or weight on them. This can usually be fixed by XML (damperMultiplier for JointRotator). If you want, I can mod the hinges for you. If not, I suggest that you put more hinges(not just one for each engine), though I'm not sure if that would work.

Sorry I can’t, I’m on iOS so no mods for me. Also the system is kind of complicated and not the usual TVC system but it’s only because it’s using XML modded VTOL engines I scavenged from other builds. But I might try with a standard TVC system too.
@DarDragon

Have you considered decreasing the weight of the engines?(or do you not xml mod)